Automatic lawn mower



FIG. 1 is a perspective view of my new automatic lawn mower,

FIG. 2 is a right side view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a front view thereof.

The broken lines shown in FIGS. 1-5 and 7 represent environmental structure and form no part of the claimed design. 

The ornamental design for an automatic lawn mower, as shown and described. 